Stator Segmented Permanent Magnet Linear Motor Direct Drive Lifting System Using Distributed Power Supply

Abstract

The invention discloses a stator sectional type permanent magnet linear motor direct-driven hoisting system in distributed type power supply. The stator sectional type permanent magnet linear motor direct-driven hoisting system comprises a permanent magnet linear motor and a permanent magnet linear motor active cell permanent magnet arranged on a lift car frame. A permanent magnet linear motor stator winding comprises stator windings of a plurality of groups of unit motors, wherein the stator windings are arranged from bottom to top and controlled through a control module. The stator windings of every group of unit motors comprise two U-shaped permanent magnet linear motor stator windings, the two U-shaped permanent magnet linear motor stator windings are in parallel connection to form the stator windings of one group of unit motors, and the control module controls the stator windings of all the unit motors directly coupled with the active cell permanent magnet and the stator winding of a next unit motor being about to run to supply power simultaneously. The unit motor stator windings switch over work in a recursion mode in the working process, whole-course electrification is not needed, and the stator sectional type permanent magnet linear motor direct-driven hoisting system has the advantages of being small in loss, saving energy and being simple in structure.

Description

technical field [0001] The invention relates to a permanent magnet linear motor direct drive lifting system, in particular to a stator segmented permanent magnet linear motor direct drive lifting system adopting distributed power supply. Background technique [0002] With the increase of population and the depletion of shallow surface resources, high-rise buildings began to extend to the air, and mining continued to develop into deep and ultra-deep underground. The depth of some mines in my country has exceeded 1000m, and the depth of some gold mines in South Africa Even exceeding 3500m, the hoist, as an important means of transportation, is widely used in various buildings and mines. With the continuous improvement of hoist energy saving, space saving, hoisting capacity, hoisting safety, service performance and service quality, the traditional wire rope traction hoisting mode has the following disadvantages: [0003] (1) The height of one lift is limited, and sometimes mult...

AI Technical Summary

Problems solved by technology

[0003] (1) The height of one lift is limited, and sometimes multiple levels of lift are required

[0004] (2) Limited by the wire rope winding speed, the lifting speed of the hoisting system cannot be too high

[0005] (3) The number of lifting systems is large, which takes up a lot of valuable building space, and the construction cost increases sharply

However, the existing segmented power supply will lead to a complex structure of the entire permanent magnet linear motor-driven cordless hoisting system, with many control points and a large amount of information to be detected. If the traditional DCS decentralized control system structure is still used, there will still be many connections. Disadvantages of poor anti-interference ability

[0009] During the actual operation of the existing cordless hoist, the permanent magnet linear synchronous motor will inevitably encounter various disturbances, which directly affect the safety and stability of the lifting system driven by the permanent magnet linear motor

For example, if the motor is out of step during operation, the mover and car will accelerate down under the action of gravity, which will directly lead to major safety accidents

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